[Herald1360]

If the set has an autotransformer the same safety issues apply as with the likes of the DAC90(A). You don't get the hot heater dropper to contend with nor the wasted power though.

Up and running with all its covers on, knobs fitted etc. it's safe enough for use by Joe Public; for working on with covers off take the same precautions as for any live mains equipment. Repair wise replace any mains connected capacitors with X or Y types as required, otherwise just use anything suitably rated.